Tuck-marking attachment for sewing-machines



M d 1.) 9 A. JOHNSTON.

TUGK MARKING ATTACHMENT FOB. SEWING MACHINES. No. 427,999. v PatentedMay 13,1890.

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UNITED STATES PATENT Gar ion.

ALLEN JOHNSTON, OF OTTUMTVA, IO\VA.

TUCK-iVlARKING ATTACHMENT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 427,999, dated May 13,1890. Application filed April 23, 1888. Serial No. 271,583. (ModeL) T0at whom, it may concern:

Be it known that I, ALLEN JOHNSTON, a citizen of the United States,residing in Ottumwa, in the county of Wapello and State of Iowa, haveinvented a new and useful Improvement in iuck-l\!l.arkers, of which thefollowing is a specification.

My invention relates to improvements in tuck-markers forsewing-machines.

The object of my invention is to provide a simple, compact, and durableconstruction, which may be cheaply manufactured and which will operatemore efficiently than those heretofore in use.

My invention consists, in connection with a creaser-blade, of a creasordevice or arm secured to or made integral with a rocking bar, to which arocking motion is communicated by a vibrating lever operated by theneedle-arm.

It also consists in a ereaser-carrying rocking bar having a torsionalaction, so that the torsional bar itself will produce or assist inproducing the requisite elastic or yielding pressure upon the cloth.

It also consists in the novel devices and novel combinations of parts ordevices herein shown and described, and more particularly pointed out inthe claims.

In the accompanying drawings, which form a part of this specification,and in which similar letters of reference indicate like parts, Figure 1isa plan View of a tuck-marker embodying my invention. Fig. 2 is a sideele vation. Fig. 3 is an end view. Fig. 4 is a detail cross-section ofthe rocking bar and the arm or projection thereon by which it is rocked.Fig. 5 is a side view looking from the opposite side from Fig. 2, andFig. 6 is a partial horizontal section. In Figs. 5 and 0 the main frameof the tuck-marker is shown in the form adapted for attachment to thebed or cloth plate of the sewing-machine, while in Figs. 1 and 2 it isshown as adapted to be attached to the presser-bar. Fig. 7 is across-section on line '7 7 of Fig. 5.

In the drawings, A represents the main frame of the tuck-marker, whichis attached rigidly or immovably to the sewing-machine. This may be ofany suitable construction, and may be adapted for attachment in theusual manner to the bed plate or to the presser-bar of thesewing-machine, as desired.

13 is the cloth gage or guide secured to an adjustable or sliding barI), mounted in suit able guides a on the main frame. The main frame isfurnished with the usual scale a for determining the position of thegage B, and the gage is fixed in position by a setscrew (1 The gage 13is furnished with the usual pointer 12.

C is the creaser-frame carrying the creasing devices and mounted toslide in suitable guides a on the main frame A transversely across theline of stitching, so that the creaser D and creaser-blade E may beadjusted in any desired position.

The creaser-frame is furnished with ascale c, which, in connection withthe pointer a on the main frame, serves to indicate the position of theoreaser frame. The creaserframe is fixed in position by a set-screw a onthe main frame. The creaser-frame is socured to or made integral withthe long flat bar E, between which and the flat spring-bar E the clothpasses.

The creaser-plate consists, preferably, simply of a turned-up flange atthe edge of the bent arm 6 of this fiat bar E. The flat bar E isprovided with a bent end or flange 6', which is brazed or otherwisesecured to the creaser-frame C. The spring-blade E may preferably beriveted to the fiat bar E.

The creaser D consists simply of a right-angle arm on the torsionalrocking barD, which is suitably journaled on the creaser-frame C.

The creaser-frame O is preferably made in the form of a tube or hollowbar, so that the hole therein will give a long bearing to the rockingbar D. The rocking bar D is furnished at or near its rear end with anarm or projection D having an eye (I, through which passes the short armf of the vibrating lever F, which is operated by the needle-bar in theusual manner. The arm D is secured rigidly to the torsional rockingbarD' by a set-screw (1', so that the rocking bar may be inserted in thetubular creaser-frame C and the parts con veniently put together. Thelength and size of the rocking bar D are such, as shown in the drawings,that the torsional strain of the rocking bar itself will give or assistin giving cloth at; such time.

the requisite yielding or elastic action to the ereaser upon the cloth.

The creaser-fralne (.1 is provided at its rear end with an enlargedtubular section (1, connected to the part 0 by an intermediate shortthimble c, the pa] ts being brazed, swaged, or tightly forced together,screw tlu'eaded or otherwise rigidly attached to each other. The purposeof thus enlarging the rear part or section of the creascr-frame is togive room within for a coil-spring G, which serves to give the rockingbar l) its upward or return movement and to raise the crcaser D from theThe operating arm or projection I) on the bar I) projects through asuitable slot or opening 0 in the enlarged section (1 of the tubularcreaser-t'rame. The ereaser-frame or the enlarged section C thereof isprovided with a tubular stud c, which constitutes the bearing for thepivotor pin f of the vibratory operating-lever F. The pivotpin f isriveted or secured rigidly to the lever F,thc same being furnished withwashers orcollars The pivot-pin f of thelever tits loosely, so that itmay slide slightly in the tubular bearing 0 as well as turn thereon,thesliding movement being simply suiiicient to accommodate the transverseradial movement of the arm D through the eye of which the short arm ofthe lever F passes. The short arm fof the lever F its loosely in the eye(I, so that it may slide in the eye of the arm D to compensate for orallow the radial movement of said short arm f about the pivot of saidlever F.

In putting the parts together the arm D will of course not be fixed toits rocking bar D by the set-screw until the parts are all assembled orput in place. The end of the rocking bar D should be flattened, asindicated in Fi 4, where the set-screw bears against the same. Therocking bar I) is preferably round throughout its length, as I thussecure a better torsional effect, as well as greater neatness andcompactness of the tuckmarker as a whole. The creaser-franie (I is madetubular for similar reasons and to give support and bearing to thetorsional rocking bar D throughout its length. The tubular creascr-frameU is prevented from turning on the main frame A bya groove or slot 0"thereon, in which fits a guide-pin a on the main frame.

The vibratory bar or lever F is provided with the usual clip orattaclnnent-pieee f for connection with the needle-bar.

In Figs. 1 and 2 it will be observed that the scale 0 is formed on theflat bar E, which is secu red rigidly to the creaser-frame and may beconsidered as part thereof, and that the scale a" is formed on the [latpart of the main frame A, while in Figs. 5 and o the scale a is on thetubular guide portion a of. the main frame and the scale 0 is on thetubular part of the creaser-frame.

In Figs. 5 and (3 it should be observed that the pointer a consistssimply of the end of the tubular or guide portion of the main frame A.

The operation is as follows: The tuckmarker is attached to thesewinganaehineby means of the main frame being slid into thesocket-piece, which is adapted to be attached to the presser-bar. Thevibratingarm is connected to the needle-barby means of the hook 1",through which the needle passes on the vibratory arm orleverF. When theneedlebar descends, it depresses the vibrating arm F, which engages atits short end with the projection l) on the rocking bar and carries itdownward. This turns the rocking bar earrying the creasing device I),which creasing device being placed above the blade on thecreaser-carrier it begins to crease soon after the needle-bar begins todescend, and continues until a considerable portion of the upstroke isaccomplished. lleretofore the tucker liasdone its marking during only asmall part of the lowest part of the stroke of the needlebar. Therocking bar is journaled in the creascr-frame and so as to have a longsupport, which is in tubular form for greater strength to a small space.The creascr-arm strokcbeing a cent inuous pressure for a large part ofthe necdlc-bars stroke prevents the striking of the needle-bar on thetucker-arm, as heretofore, over which the cloth to be creased passes.The crease in the cloth is made by the pressure of the creasing deviceupon the blade. The rocking bar is small, and thus affords a certainamount of elasticity or yielding'pressure by means of the twisting ofthe rocking bar.

I elaim The combination,with aereaserarm provided with a rocking barhaving a twisting action upon its longitudinal axis, of the lower memberor lip of the tuck-n'iarker, substantially as specified.

2. In a tuck-marker, the combination,with a frame and a creaser lip ormember carried thereby, of an. opposing movable ereaser device, arocking bar having a twisting action upon its longitudinal axis andjournaled in the frame, and to which said movable creaser device isrigidly secured, and a vibratory lever pivoted on the frame and adaptedto be operated by the needle-bar, said vibratorylever being in aseparate piece from said rocking bar and having a loose connectiontherewith at the opposite end from said creaser device, substantially asspecified.

In a tuck-marker, the combination, with a frame and a creaser lip ormember carried thereby, of an opposing movable creaser device I),rocking bar I), provided withan arm or projection D a vibratorylever F,operated by the needle-bar, and having a. short arm f for actuating saidarm or projection, substantially as specified.

4. In atuck-marker, the combination of a creasing device, a rocking barcarrying said device and having a twisting action upon its longitudinalaxis, a co-operating creasing IOC member or lip, a bearin g for saidrocking bar, and a main frame, in which said bearing is mounted and bywhich it is held from vertical movement or vibration, substantially asdescribed.

5. In a tuck-marker, the combination of a rocking bar having a twistingaction upon its longitudinal axis, a creasing device carried at one endthereof, a bearing or support therefor, means for communicating motionfrom the needle-arm of the machine to said rocking bar, a co-operatingcreasing member or lip, and a main frame attachable to a stationary partof the machine and connected with said support or bearing, substantiallyas described.

6. The combination of main frame A, a tubular creaser-frame C, mountedto slide in a guide on said main frame, a creaser E, avibratory leverpivoted to said creaser-frame, a torsional rocking bar journalcd in saidcreaser-frame, and having a creaser-arm at one end and an operating-armat the other, said vibratory lever having a short arm connected with theoperating-arm of said rocking bar, and said tubular creasing-framehavinga transverse slot or opening, through which said operating-arn1 of therocking bar projects, substantially as specified.

7. The combination of main frame A, a tubular creaser-frame O, mountedto slide in a guide on said main frame, a creaser E, a vibratory leverpivoted to said creaser-frame, a rocking bar having a twisting actionupon its longitudinal axis journaled in said creaser-framc, and having aClGftSGlitlm at one end and an operating-arm at the other, both saidarms being rigidly securedto said rocking bar, said vibratory leverhaving a short arm connected with the operating-arm of said rocking bar,and a spring for turning said rocking bar in one direction,substantially as specified.

8. In a tuck-marker, the combination,with a creaser-frame, of avibrating lever pivoted thereto and adapted to be operated by thesewing-machine needle-bar, a rocking bar having a twisting action uponits longitudinal axis journaled in the creaser-frame and carrying acreasing device, said rocking bar having at the opposite end from said'creas ing device an operating-arm rigidly conn ected thereto andloosely connected with and actuated by said pivoted vibrating lever,

whereby said creasing device is given an elastic or yielding pressuredown upon the cloth to be creased by the twisting action of the rockingbar, substantially as specified.

9. In a tuck-marker, the combination,with

a main frame having guides thercon,of an adj ustable creaser-framecarrying a creaser device and having a cylindrical tube sliding in theguides on said main frame, and a creasercarrying rocking bar inclosedand journaled in said tube, whereby said tube serves both as a journalfor said rocking bar and asa support and guide for the creaser-frame asit is moved or adjusted back and forth across the line of stitching, andmeans for clampingthe tubular creaserframe to the main frame,substantially as specified.

10. The combination, with a creaser-frame having a cylindrical tube, ofa creaser-carrying rocking bar i nclosed in said tube, a coiled springinclosed in said tube for turning the rocking bar in one direction, acreaser E, and means for rocking said creaser-carryin g rocking bar,substantially as specified.

11. A main tuck-marker frame furnished with guides and provided with acreaser-frame having a cylindrical bar adapted to support and guide saidframe in the guides on the main tuck-marker frame when it is being movedback and forth across the line of stitching, in combination wit-h arocking bar having a twisting action upon its longitudinal axis carryinga creasing device and a vibratory lever, said torsional bar having arightangle projection rigidly connected thereto and engaged by saidvibratory lever, both connected to said creaser-frame, substantially asspecified.

12. In a tuck-nmrker, the combination of a rocking bar having acreaser-arm, a tubular bearing therefor, a co-operating creasing member,a main frame comprising a presserfoot and having two arms terminating inguides, in which said bearing ismouuted, and a cloth-gage movablebetween said arms and sliding in guides carried by said main frame,substantially as described.

13. In a tuck-marker, the combination, with a creaser-frame carrying acreasing device, of a main frame comprising a presser-foot, a plateprojecting laterally from said presserfoot in front of and substantiallyparallel with the creaser-frame, and arms extending to saidcreaser-frame and terminating in guides, in which the latter is mounted,said arms forming an open space between them and between the main frameand creaser-frame, and a gage working in said open space and supportedin a guide or guides on said main frame, substantially as described.

ALLEN JOHNSTON.

XVitnesses:

J. T. HAOKWORTH, A. G. HARROW.

